Bacteria can be engineered to sense a variety of molecules, such as pollutants or soil nutrients. In most cases, however, these signals can only be detected by looking at the cells under a microscope ...

To use a light microscope to examine animal or plant cells. To make observations and draw scale diagrams of cells. Turn the coarse focus so that the stage is as close to the objective lens as ...

With the invention of the microscope at the beginning of the seventeenth ... Hints at the idea that the cell is the basic component of living organisms emerged well before 1838–39, which was ...